THESAURUS
forsooth
absolutely, actually, and no mistake, assuredly, at all events, at any rate, by all means, certainly, clearly, decidedly, decisively, definitely, distinctly, factually, for a certainty, for a fact, for certain, for sure, historically, in fact, in reality, in truth, in very sooth, indeed, indeedy, most assuredly, most certainly, nothing else but, of a truth, of course, positively, really, really-truly, surely, to a certainty, truly, undoubtedly, unequivocally, unmistakably, verily, veritably, with truth
ROGET THESAURUS
forsooth
Affirmation
N
affirmance, affirmation, statement, allegation, assertion, predication, declaration, word, averment, confirmation, asseveration, adjuration, swearing, oath, affidavit, deposition, avouchment, assurance, protest, protestation, profession, acknowledgment, legal pledge, pronouncement, solemn averment, solemn avowal, solemn declaration, remark, observation, position, saying, dictum, sentence, ipse dixit, emphasis, weight, dogmatism, dogmatics, asserting, declaratory, predicatory, pronunciative, affirmative, soi-disant, positive, certain, express, explicit, absolute, emphatic, flat, broad, round, pointed, marked, distinct, decided, confident, trenchant, dogmatic, definitive, formal, solemn, categorical, peremptory, unretracted, predicable, affirmatively, in the affirmative, with emphasis, ex-cathedra, without fear of contradiction, as God is my witness, I must say, indeed, i' faith, let me tell you, why, give me leave to say, marry, you may be sure, I'd have you to know, upon my word, upon my honor, by my troth, egad, I assure you, by jingo, by Jove, by George, troth, seriously, sadly, in sadness, in sober sadness, in truth, in earnest, of a truth, truly, perdy, in all conscience, upon oath, be assured, yes, I'll warrant, I'll warrant you, I'll engage, I'll answer for it, I'll be bound, I'll venture to say, I'll take my oath, in fact,
forsooth, joking apart, so help me God, not to mince the matter, quoth he, dixi.